Farm tractor



Feb. 27, 1923. 1,446,913,

' 0, L. LEWIS.

FARM TRACTOR..

FELED JULY 28,1920. :1 MEETS-SHEET a,

L INVENTOR.

O. L. LEWIS.

FARM TRACTOR.

FELED JULY 28, 1920.

I! SHEET SHEET 2,

Feb. 27, 1923.

0. L. LEWIS.

FARM TRACTOR.

HLED JULY 28.1920.

IISHEETS SHEET 3.

. Feb. 27, .1923,

' 1,446,913, 0. L. LEWIS.

FARM TRACTOR.

FILED JULY 28, IQZO- ll SHEETS-SHEET 1 0m 021M, INVENTOIQ.

0. L. LEWiS.

FARM TRACTOR.

HLED JULY 28, 1920'.

gm (m of H ShEETSSHEET 5.

INVENTOR.

Feb. 27, 1923,

L l-46,913. I

O. L. LEWIS.

FARM TRACTOR.

HLED JULY 28,1920.

ll SHEET SHEET 6.

I IIIAEaI/IIIIIIIIIIIIIIIIIIIIII/ll n nu: Illllllllllll flagellaINVENTOR.

W 0. L. LEWIS.

' FARM TRACTOR. v

FILED JULY 28, 1920. II SHEET-SSHEET 7.

a2. I mwzmoza;

Feb. 2'7, 1923, 1,446,913. 0. L. LEWiS.'

FARM TRACTOR.

, FILED :uwza. 1920. ll SHEETS-SHEET 2.

, INVENTOR.

Feb, 21 19238 1 I 1,446,913 0. L. LEWIS. FARM TRACTOR. v FILED JULY28,,1920= H SHEETS-SHEET 9-, Q

INVENTOR.

656.!) Km, V 192 11 SHEETSSHEET H- 0 L LEWIS FARM TRACTOR.

FILED JULY 28,1920.

Feb, 27, 1923. V

J. ToR

Patented Feb. 27, 1923, a y

NITED. sT PATENT OFFICE.

OTTO LEROY LEWIS, or :HoUs'roN," TEXAS.

FARM TRACTOR. Application filed July 28,1920. serial No. 399,599i

To all wlwme't may concern: ciently operate in connection with a multi-Be it known that I, OTTO LEROY -LE'W'IS, cylinder motor providing forample power a citizen of the United States, and a resi- 'for' alloperations to which it is likely the dent of Houston, in the county ofHarris machine will be put. I 5 and State of Texas, have'i'nvented a newand Still another important feature of the 60 useful Improvement in FarmTractors, of invention resides in the means by which which thefollowing' is a specification. either-side of the front or rear end ofthe- My present invention relates generally to tractor may rise orall inpass ng'over farm tractors and more particularly to a an elevation ordepression Without affecting tractor of the front wheel drive type andthe other side or other endor straining the 65 the primary object of theinvention is the frame and without endangering tilting or provision ofan improved tractor of this tipping of'the machine at any point to annature capable of .pulling agricultural imundesirable extent. vplements, vehicles and the like and adj u st- In general the tractorproposed by my iIl-'.

able to provide the required overhead clearyentionhasan internalcombustion engine 70 ance for orchard cultivation permitting mounted atthe front andjsupported and .its ready passage beneath overhangingsuspended'by certain novel connections and branches of trees, as well asunderneath. means including aframe bolted at its rear clearancepermitting ofits usein the cultito a transmission case. At the oppositevation of growing crops, particularly the sides of the transmission caseare radially 75 final cultivation of'liigh growing crops such swingingarms, depending. therefrom, which as'corn, cane, cotton a d the like.support the forward driving wheels and In carrying'out my lnvention andprowhich also carry thedriving connectionsby viding an apparatusadaptedto fulfill the means of which these wheels are rotated.

general objects'just above stated, I employ At the upper and lowerportions of the 80 a machine one of the'main features of whichtransmission case are swivel connections consists in providing two frontdrive wheels with a yoke frame, permitting the trans- I which may beconveniently raised or lowmission case, driving connections, front 7ered together as well as independently of drive wheels, engine andengine support to one another with respectsto the body of be rotatedhorizontally while at the same 85 thetractor and two rear supportingwheels time held against vertical movement rela-' which may not only beconveniently raised tive to "the yoke frame. This rotation foror-lowered together and independently of steering purposes isaccomplished through one another, but may also be shifted toward certainmeans including'connections which and away from one another. 'Thesefeatures *extend rearwardly to and within convenient 90 coact to make itpossible to secure desired reach of the operators station, along withclearance underneath the machine in the' controlling connectionsfor gearand clutch cultivation of tall crops and to bring about shifting means,brake, and throttle. Thethe necessary overhead clearance when-1issupportor frame of the machine-also in- 40 ing the tractor in orchardcultivation. It' cludes a torque member attached to the yoke 95 is alsopossible to run the wheelsatone frameat its forward end and toe rearside ina previously formed furrow when frame at its rear end, whichlatter provides plowing while the wheels at the other side propersupport of the two rear supporting move on unplowed ground in order topro wheels with; their adjustable connections.

mote easy steering and the same time main- ,With this general outline itis believed'loo tain the entire machine generally level. The thefollowing description wil'].be better unrelative adjustment of the rearwheels todersto od andmay be readily followed in its ward and awayfromone another furtherreference to v. the accompanying drawings morepermitsof increase in stability of the which illustrate the inventionand form a.

tractor especially desirable when the ma part of this'specification, andin which 10.5 chine is working in elevated position. v F igure l-lsaside elevation of the com- J Another feature of the invention residesplete machine, in the effective support of the motor and Figure '2 is atop plan view thereof, its frame-in such away as to avoid all Figure3isa front elevation, obstacles to underneath clearance and sift. Figure4 is a top plan view of theforward portion with certain parts, brokenaway and in section, illustrating more particularly the motor suspensionmeans,

Fig. is a side elevation of certain portions of'Figure 4, parts beingbroken away and in section,

' Figure 6 is a vertical transverse section taken substantially on theline 66 of Figure 5,

Figure 7 is a vertical transverse section through a portion of one frontdrive wheel,

its supporting connections and driving means,-

Figure 8. 1s a detail side view of the rotatably adjustable connectingcylinder of Figure 7, I

F'gure 915 a vertical longitudinal'section through, the transmissioncase and adjacent parts, a

Figure 10 is a vertical transverse section taken substantially on theline 10-10- of Figure 9,

Figure 11 is a detail section through the reversing gear arrangement,

Figure 12 1s a top plan view of the transmission case, partly brokenaway and in section,

Figure 13 1s a top view, partlyv broken away and in section,constituting a detail of the steering means,

Figure 14 is a detail of certain parts of the gear shifting mechanismdetached from the transmission case,

Figure 14; is a detail horizontal section through certain parts of theclutch-operating and gear-shifting device, 9 i

Figure 14 includes a side and end 'view of the segmental gear of Figure14,

Figure 14 is an enlarged top plan view of a portion of the bushingshownin Figure 14:.

Figure 15 is a vertical section through.

certain of the manual controlling connections, I

Figures 16 and 17 are detail views partly in elevation and partly insection, of certain connections of the rear wheel supporting ventionproposes in the first. instance an internal combustion motor indicatedgenerally at 1, which may, be of any suitable type and and'191 arerespectively a top the supports of'which as I'will now describe providefor considerable variation as to size, number of cylinders, etc.

ing U-shaped frame 3, at its front end by Themotor is sei icurelyfastened within a rearwardly op'en- 7.

means of a forward cross-beamor strip 2 which parallels the forwardcross-bar of the frame in spaced relation. This forward cross-bar ofthe. frame also supports the radiator 4 to the upper portion of which.is fastened the forward-portion of the motor cover 5 connected at itsrear end to the fuel tank 6. This tank is located slightly to the rearof the motor 1 and is supported in elevated position above the motor bybrackets 7 secured to and upstanding from the rear supporting member 8of the motor 1, whichwith the rear end of the motor is securely fastenedto the forward portion of the transmission case 9 by bolts 10. The rearends of the extensions of the U-shaped frame 3 are securely bolted tothe forward side portions of the transmission case 9 by bolts 12 as seenparticularly in" Figures 1 and 5 and have securely fastened theretointermediate their ends laterally outstanding brackets 14 to which arerigidly and adjustably'secured the lower forward ends of a truss rod 13whose extensions project forwardly and downwardly at angles. over lugs11 carried by the upper side portions of the rear motor supportingmember 8. Intermediate its ends this truss rod which is generally ofV-shape is looped arounda stud 15 upstanding from the forward portion ofthe transmission case 9 and from which its extensions project inapproximately a horizontal plane to the lugs 11,-the latter being thusutilized substantially as struts, -wherebythe strain of support isequalized and the mottr' frame -3 effectively supported without thenecessity of'under frame connections, the effect of which would be to 1curtail underneath clearance-of the machine,

Among other things supported by the transmissioncase 9 is an upperlaterally projecting shaft to be hereinafter referred to. carrying abelt-pulley 16 which is'expo sed in order toprovide for taking the powerfrom the machine for externa-Lpurposes, and. in addition to this pulley16 at one side, the

transmission case supports at each side a depending drive wheelsupporting arm or frame 17 from which each of the'forward' drive wheels18 is adjustably supported and driven. This latter mechanism is wellillustrated in Figure 7, the section of which is taken approximatelyalong the line 77 of Figure 1, and from which it will be noted that eachside of the transmission case forms a rigid support as'indicated at 59,apertured to IGCGIVB thG inner portion of a connecting cylinder 58 inrota-table relation.

The transmission housing also includes therein a differential case 85from which differential. shafts 84 extend and which differential casehas rotatable bearings, preferably anti-friction bearings as indicatedat -87 one-within the inner end of-the adjacent connecting memberorcylinder 58 of Figure 17. Each differential shaft 84 projects out-1wardly through the respective connecting -cylinder 58 and has anantifriction bearing 86 in the outer end'of the connecting cylin-' deradjacent to a. sprocket wheel 83secured on the outer end of the shaftwithin the upper or inner endsof thewheel supporting arm 17.

The inner end of each connecting'cylin-. der 58 is'moreover providedwith a worm gear 58, engaged by meansof anadjusting worm 177, ournaledin the sidewall '59 of I the transmission housing, and each connect-Uing cylinder 58 is furthermore. provided withan annular rib or flange 58enclosed in rotatable ,relation' within a confining ring I 224 securedbybolts 225 to the trans'missi'on housing. p i

' The upper end of each wheel supporting arm or frame 17 is open atoneside to receive the outer end of its respective connect ingcylinder58vto which it is rigidly connected by bolts 17? -may thus swing on theaxis of the differential'shaft 84 by virtue of the rotatable-Iconnectionand of the connecting cylinder with of the gear connections 58and 87.

Intermediate its ends eachwheel support ing arm or frame 17 ispreferably provided with a sprocket shaft 75 having a sprocket thetransmission housing and under control wheel 81 thereon connected by asprocket chain 82 with a sprocket wheel83 of its dif-.

ferential shaft.' Shaft 75 preferably has bearings 76 at its oppositeends, the inner bearing 76 being supported within. an inner cap plate 78securely bolted'to the arm or frame and the outer bearing 76 beingsimi-. larly supported in the upper or inner portion of a cap plate79having below the bearing 76' an enlarged opening 80 which re-' Iceives the inner flanged portion of the hub 71 of therespective-wheel18. Shaft 75 is i also provided with a gear 74 thereonwhich meshes with a gear 72 secured upon the inner face of the hub bybolts 73. a

Adjacent to its lower or outer. end each I wheel supporting frame or arm17 has a thereof, between the positions so that the entire arm- .70, sothat the bearings are thus effectively protected against the entrance offoreign matter and the hub may be filled with grease or other lubricantat all times. -It'thus becomes evident that each front wheel 18 isdriven through connections housed bythe supporting arm or frame 17thereof, from its respective differential drive shaft 84, andthat byvirtue of this arrangement each drive wheel may beswung either togetherwith the opposite wheel, or independent shown in full and dotted linesin Figure 1.

At the rear of the transmission case 9 is an upright yoke frame 20, thelower forwardly extendingportion 20 of which is "pivotally connectedtothe lower portion of thetransrmssion case by means of a plate 21.

securely bolted to the transmission case and provided with a hollowpivot stud 21 depending into a receiving socket therein and apertured atits lower end so as to provide for movement of lubricant downwardly fromthe transmission case and around the pivot stud and thoroughly lubricatethis connection. This construction is, clearly shown in the lowerportion of Figure 9 and it will be observed that the lower end of theopening of the portion 20 of the yoke member is closed by an expansionplate 134 so as to efiectively retain the lubricant around the pivotjoint and the upper surface of the portion 20 has an annular groovearound the stud21 holdinga felt or similar washer 135 which plate 21;

The upper forward portion of the'yoke member is constitutedj'by asteering gear housing 22, having a cover 23 and enclosing a worm wheel136 secured upon the upper end 'of a post 137 rising from a plate 137presses upwardly against the securely bolted to the top of thetransmission case 9. This post 1'37 extends vertically through a bearingring138 securely bolted to the lower surfaceof the steering gear housing22 and containinganti-friction bearings 139 around the post below theworm wheel 136. At one side, the steeringgear housing 22 has bearings175 as plainly seen in Figure I 13, supportinga shaft 174 having a worm174 inengagement with the worm wheel 136, one extended end of shaft 174having a gear wheel 173 secured thereon and en gaged by a gear 172 uponthe forward end of the stud shaft 171, which latter has a bearing in theupper portion of the yoke member .20 and has a rear exposed and squaredend for connection by a universal joint 31 as seen in Figure 1 to the.forward end of a steering rod 29. 'The rear end of this rod extendswithin a forward clamp 30 of a treme rear end a steering wheel 57located forwardly of and above the operators seat 42, and it is thusobvious that upon moverear,steeringshaft28 having at its ex- 1 upon theupper end of a rear control box' ment of the steeringwheel 57 in eitherdi-- rection rotation will be communicated through the steering rod 29and through gears 17 2 and 173 and again through worm 1743 and wormwheel 136 to the steering post w 137 so as to shift the entireforestructure in- I ffcluding transmission case, engine support :.andfront drive wheels, it being noted that the post 1372 is in verticalalinement with the lower" pivot 21 ofthe yoke member as clearly seen byreference to Figure 9.

i 26, is-provided at its upper end with a lug 25" through which the rearend of the throttle control rod 2 1 is'journaled. This control rodextends forwardly-in parallel vertically spaced relation with respect tothe steering rod 29 and has its forward end fastened through anupstanding lug 23 of the cover 23 of the steering gear housing,forwardly of which throttle control rod 21 is connected by a universaloint 24 with a rod 24* which extends forwardly ,to the carbureter (notshown). I I q Thecontrol box 26 just above referred to is rigidlysecured upon the upper portion of v the rear end of acentrallongitudinal torque and frame beam 27 whose forward end is rigidlybolted to the steering yoke 20. The rear end of this torque, member 27supports a seat bar43, and its most important function is ,the supportof a rear rectangular i frame62 having frontand rear braces 60 and 61rotatably engaging the torque member respectively at an intermediatepoint and adjacent to its rear'end. At lengthwise spaced points upon thetorque member 27 and within the frame 62 are collars 63 one of which isshown in detail in Figures 16 and 17, each collarhaving a lower clamp 63including an inner rotatable sleeve 192 having a squared socket for thereception of the squared inner end of one of the angular supporting bars39 of therear supporting wheels 40. As will be seen in Figure 2 theouter portions of these-bars turn downwardly beyond the side bars of theframe 62, the latter being each provided with a rigid gear box 38rotatably holding and supporting a worm wheel 200 having a squared axialbore 200 through which the wheel supporting bar passes. Each gear box 38also has averticallydisposed and rotatable worm shaft 197.1'etainedtherein inrotatable relation by virtue ofa pin or bolt extending througha hole of the box and partially within an annular groove'198 of the saidshaft. The shaft is provided with a polygonal external end to receive awrench and its body is squared or polygo- 'nally shaped Within the gearbox to receive Splined upon worm wheel 200. By reference to Figure 18 inparticular it will be noted that the wornrwheel 200 bears against aportion of the housing 38 at 201 and that the hub of thegear has bearingin the gear housing and is retained; by "a leap 202 connected'to one endthereof by bolts 203 and adjustable by these bolts so that the gear 200may be drawn tightly against the housing38 along the face 201. Theopposite side of the gear box is closed and protected bya cover 204 andit is obvious, from this arrangement that by simply loosening theclamping bolts 19%; of Figures 16 and 17 and then rotating the wormshafts 197, the supporting wheels 40 may be swung upwardly or downwardlywith respect to the frame between the positions shown in full and dottedlines in Fig-' ure 1. I"

.Power is taken in the first instance from the flywheel (not shown) ofthe motor to a shaft 88 as seen in Figure 9. engageable with the flywheel by means .of the ordinary support 90 attached to a portion of thehousing; The clutch above mentioned is control -lable by a clutchthrow-out collar 91 on-the" shaft 88 engaged by a clutch throw-out yokean anti-friction bearing at 89 in a bearing 92 pivotally mounted upon across shaft 93 and provided with an upper transversely disposed roller96 mounted on a cross pin 97. .Beneath this roller. andbeneath aremovable cap 9 1 of the upper forward portion of the transmissionhousing through which access may be had for adjusting the clutch,extends the forward reduced end of a lengthwise movable shaft mounted toslide and rotate lengthwise through the 11pper portion of thetransmission housing and connected at its rear end by a universal joint106 with the forward end of a shaft 105 whose lengthwise movements thuscontrol the clutch. a

This shaft projectsrarwardly through 'a tube 32 which will behereinafter referred to and its rear end is slidably and rotatablymo'unted in the control box 26 before referred to anda s shown in Figure15. a collar 191 on the rod within the control box prolatter is rotatedin order to actuate the shifterarm 190 by means of a hand-lever 37upstanding at the right-hand side of they;-

control box looking forwardly as scen -in Figure 2. I m

as seen in Figure 9 is the hub-.100 of'a segmental gear 99, said hub andits gear being clearly'shown in Figure 14:". The hub 100 a portion 98ofi'the 95 mission housing channel 165 the moved has a squaredprojection 101 which projection is movable in channels 165 and 168 of abushing 102 securely held within the transv by a bolt 103 and withinwhich the hub 100 is slidable lengthwise'and oscillatable. The channels165 and 168are respectively the bushing 102 and lengthwise through itsforward thereof of Figure 14 of this bushing wherein it will be notedthat along the rear side of the bushing has notches 1'64, 166 and 167,notch 166 being-opposite the lengthwise channel 168. In its forward edgethe bushing also has notches 169 and 170 respectively opposite thenotches 164 and 167. The forward end of the universal jointf106 is sospaced from the rear end of the hub 100 of segmental gear 99vthat whenthe rod 105 is pressed forwardly to shift the clutch collar 91,continued'forward movement to the limit of movement of lever 37wil-lfcause the universal joint 106 to engage the hub 100 and shift thelatter forwardly a sufli: cient distance to move the hub projection 101out of either of the notches of-the bushing 102 in which it mayhave beenseated,

and wherein itis held under normal circumstances by the tension ofspring 104 around the rod 95 between the front wall of the transmissionhousing and the segmental gear 99. Thus upon forward shifting of rod105, the clutch is disengaged and the segmental gear projection at thesame time so that it is free foroscillation. T0 effect this oscillationrod 105 is rotatable in addition to its lengthwise movement and thisrotation is brought about by virtue of a bevel gear 186 splined upon itsrear portion within the control box 26 as shown in Figure 15 and engagedby a segmental gear 187 secured upon a shaft 188 thelatter of which isjournaled through the left-hand side of the gear box and has securedthereon a shifting lever 36, the splined connection of gear 186permitting of lengthwise movement of rod 105 in respect thereto.

The segmental shifting gear 99 of Figures 9 and 14 is movable to engageeitherof a pair of gear shifting rods 122. and 123 journa led attheir-opposite ends in bearings 161 and 162 of the transmission housingand extending transversely of the housing as particularly shown igures9and 14, Each'of these rods has an upper rack face with which thesegmental gear 99. is enga geable, the latter being shiftab-le from"therearmost rod 122 to the foremost rod when the projection 101 of hub 100moves through the channel of bushing 102, and inasmuch as thischannel,168 is opposite the neutral notch. 166

it is obvious that each of the gear shifting rods 122 and 123 must beneutrally positioned before the segmental gear 99 can endisposedcircumferentially of edge as seen particularly in the enlarged detailpartial plan view;

gageable with jack shaft gage and move the other shifting rods 122 and123 is preferably provided with a ball .163 to cooperate with shaft 126journaled at-its opposite ends'inbearings 140 and 142, the formerofwhich is closed -at one side of the transmission housing by a.cap 141,-On this shaft 126' is secured a bevel gear 125 which permanently mesheswith a bevel gear 124 its shift-ing movement on shaft 126 by a shiftingarm 160 depending from the shifter rod'123.- Parallel with and'below theshifting gear shaft -126 is a'jack shaft 118 mounted at its oppositeends in bearings 243, this jack shaft having securely fastened thereonlaterally spaced gears 132 and 144 respect-ively engageable by thesp-lined gears 127 and 143 and also having secured thereon a gear 145permanently in mesh with a gear 146 secured tothe ent-ialcase 85 as'plainly seen in F igure 10. At the rear of the vertical plane of theshafts 126 and 118 and between the latter, areversing gear shaft 131 issecured: in a portion of the transmission housing 9 by means of a lockedset screw 131 and on 0 this shaft is a bearing. sleeve 130 carryingconnected rotatable gears 129 and 161,t-he former-of which ispermasition in engagement with a gear 161, re-

spectively upon opposite sides of the neutral position and controlled insuchmovement bythe operation of shifting rod 122 when the shifting gearprojection is respectively in the notches 164, 167 and 166 along channel165 of the bushing 102.

Splined gear 143 in one position is engear 144 and when Below thegearshift-ing rods 122 and 123' into a selected gear position. Thebearing 162 at one end of the of the "clutch shaft 88 ;-also on theshaft 126 are two spline'd gears 127 and 143, the former of which iscont-rolled inits movement lengthso engaged completes the high gearposi- 'tion parts and is also movable on the shaft 126 to engage an idlegear 147 mounted on'bearings 149 of a shaft teneol in a portion of thetransm ssion hous- 148 securely fas- 1 ing by a pin 150, this stub shaftpassing through an oil compartment 151 in connection with the bearing149 by a small channel 151 and fed from a catch basin 152 intowhich theoil splashes during movement of the gears. Idle gear 147 is permanentlyin mesh with a gear 159 of the shaft 120 of the belt pulley 16previously mentioned.

Shaft 120 hasa bearing 121 seen in Figure 10 at one side of thetransmission housing and a bearing 153 adjacent its opposite end in theopposite side of the housing with a sleeve 154 supporting felt rings andthe like 158 constituting washers engaged and held in place by aclamping ring 157 attached to the housing. On the external. portion ofthe shaft 120 belt pulley 1-6 is held by an vend cap 156 attached totheshaft end by an adjusting screw 155 Whichioperates to hold thebearing 153 rightly in place.

Shifting gear shaft 126 being permanently in rotative engagement inoperation with the clutch shaft 88 and jack shaft gear 145 being alsopermanently engaged wlth the 'gear 146 of the difierential'85 throughrotation of which the differential shafts 84 forming the drive shafts ofthe two front j so wheels, are rotated, it is obvious that with thegearing as shown in Figure 10, low

speed is applied through splined gear 127 and jack-shaft gear 132. Atthis time the shifting gear projection .101 is in the low speed notch164 of bushing 102. Whenever gears are to be changed theunusuallengthwise movement of rod 105 must take place in order to shiftthe gearhub-100- forwardly against the tension of spring 104 in order todisplace the. same from the bushing notch in which it"has beenpreviously held by the tension of the spring and thus preceding-eachgear shifting operation the clutch.

is first thrown out.- v v I In addition 'to the gears 132, 144 andf145,the jack shaft 118 has secured thereon between gears 132 and 144 a brakedrum 117, against the lower portion of which a brake shoe 114 with itslining 115 is verticallyshiftable- This shoe is compensatingly pivotedat 119* upon the forward end of an intermediately pivoted brake lever119 whose pivot appears at 119 in Figure 9. The rear end of this brakelever whichis located within'the transmission housing is bifurcated toreceive the lower portion of a vertically shiftable rod 107 around whicha spring 108 is coiled and compressed between the.

lower portion of theitransnlission housing and a washer 109 engagingthe'undersur' face of the lever so that the latter is normally held withthe brakeshoe in lower most disengaged position." On this rod 107 isfixed a collar 111'. disposed above the-rear end of the brake .lever119, having apin 112' which secures the collar in place and, en-

gages portion 113' of a brake-lever as clearly seen in Figure 9. Theupperend of the rod 107 projects externally through a bearing of thetransmission housing 9 and hasa shoe 35 on its upper end engaged by acam 34 secured upon the forward end of the tube 32, the latter of whichhas secured to its rear end adjacent to the control box 26a laterallyprojecting arm 33 as seen in Figure-15 which is preferably connected bya pivot 181'with a connecting arm 180 leading to either a hand or footlever (not shown) disposed within convenient reach of V the operator.. I

Referring a ain to the rear supporting wheels and to igures 20 and 21,it will be noted that the inner end of the axle 207 of each of the rearsupporting wheels 40 has a clamping member 209 having clamping bolts208, adapted to embrace and rigidly connect the axle with its respectiveangular support '39, whose horizontal portion is ad justably mountedthrough the device shown in Figures 18 and 19 bolted tov the -respectiveside of the -rear rectangularnframe 62 and the respective clampingmember 63 of the central frame or torque member 27 On each axle 207 therespective wheel 40 has bearings 205 separated by a spacing and oilingcollar 206, the hub of the wheel having at its inner end a washercarrying ring 218 with fiber or other washers 217 protected by -asurrounding'petticoat 216 attached to the inner flanged end of the axle,the latter of which may have a lug 210 as seen in Figure 20, forengagement with a selected recess 211 of its supporting arm '39 andwhich cooperates with the clamp 209 to secure the wheel in desiredadjustment along the outer angularportion of the supporting arm. At itsouter end the axle 207 has a collar'214 secured thereon by a removablepin 215 v i which abutsa washer 212 disposed against the end ofthe-wheel hub and secured thereto by a cap 213 closing the outer end-ofthe hub for the purpose of holding lubricant dirt, and other foreignmatter.

of a post 48 rigidly secured to the lower, .portion of the steering yoke20 by a bolt 49 and dependin below this yoke. Collar 50 on the post by alower cap 51, and the draw bar 52 may be supported is loosely heladjacent to its rearlend and adjacent to the 7 AS: seen particularlymFigures. 1 a 2 I clev'is' 52f by passage through the lowerapertureclicross strap 220 of downwardly con- 110 therein and preventingentrance of dust,

verging supporting beams 219. This sup-.

port is shown in Figures 22 and 23 wherein it will be noted that theupper ends of the supporting beams 219 forming in part the surrounding asplined collar 222 bored to receive the inner horizontal portions of therear wheel supporting arms 39. Each clamp 221is controlled by a clampingbolt 223 by means of which thesupport 5l'may be rigidly set in position.here the support 54:, is used it is obviously necessary to loosen theclamps 221 when loosening the previously described clamps 63in'adjusting the rear supporting wheels up and down with respect to theframe of themachine, and it is to be understood that the samesocketwrench applicable'to the .worm adjusting" shafts 197 for theadjustment of the rear wheels may be'utilized upon the externalpolygonal ends 177 of adjust-ing worms 177 of the front driving wheels,seen in Figure 12, wherein. it will be noted that these adjusting worms177 are mounted on annular portions of the transmission housing and intothese grooves 179.

As previously stated the front and rear attaching pieces ,60 and 61 ofthe rear frame 62 permit the'latter to-swivel on the. frame or torquemember 27 and the clamps 63 for the inner portions of the rear' wheelsupporting arms 39 are likewise-to facilitate this movement although toalimited extent by virtue of side slots 63 of these clamps as shown inFigures 16 and17, into which the opposite heads195 of' bolts 196extending ,polygonally through the frame or torque member 27 project. Itthus becomes obvious that each of the rear wheels can yield to a limitedextent in 'a vertical direction, over rigid obstructions, the extent towhich this movement can take place being limited so as to safelv avoidall danger of overturning.

support, a transmission housing to which said motorsupport is rigidlyfastened, front wheel sup-ports -swingingly connected to the sides ofthe transmission housing, a. steering 'yoke pivotally connected to theupper and lower portionsof the transmission housing to form ahorizontally swinging steering connection, steering means therefor and arear frame rigidly connected to the steering yoke and having swingingrear wheel supports, as described. l D

2. A tractor having a. frame including a forward motor support, atransmission housing to which the motor support is connected, a steeringyoke to which the transmission housing is pivotally connected to.

ing, driving connections in the gear housing and the said supports foractuating the front wheels, and arear' frame having hinged connectionsat its forward portion with the said gear housing and having verticallyadjustable wheels in connection therewith, as described.

4. A tractor including a front motor support, a transmission housing to'which the rear pontion of the motor support is connected, swinging sidemembers, pivotally connected. at opposite sides of thetransmissionhousing and forming vertically'adjustable wheel supports, said wheelsupporting members being in the form of frames, driving connections forthe front wheels within the said housing and-extending through the saidwheel sup-porting frames, and a rear frame having vertically adjustableside wheels and having pivotal'connection with the upper and lowerportions of the transmission housing for steering purposes, asdescribed. I

5. A tractor including aforward driving and steering section havingdriven side wheels, a rear section having a steering yoke connectionwith the front section and including rearwardly extending central and}side bars, angular arms having'their outer portions depending from saidside bars and having their inner horizontal portions adjustab-ly journaled in the side. bars and the .central bar, connections for swingingthe said arms and permitting of relative adjustment of the same towardand away from one another, and rear wheels. adjustably mounted on thedepending-outer portions of said arms, as described.

6. A tractor having front and rear wheels,

swin in side su orts on which the wheels OTTO LEROY LEWIS.

